Work-holding chuck.



No. 718,573. PATLNTLD JAN. 13, 1903. G. DL LAVAL & o. W. GHISHOLM.

WORK HOLDING CHUCK.

APPLIOATION FILED MAY 2, 1901.

4 SHEETS-SHEET l.

N0 MODEL.

No. 718,573. I PATBNTED JAN. 13, 1903. G'. DE LAVAL & C. W. CHISHOLM.

WORK HOLDING CHUCK.

APPLIUATION FILED MAY z, 1901.l

No MODEL. 4 SHEBTSJSHEM z.

- wm ww 11mm m mlm] mlm PATENTED JAN. 13, 1903. A G. DE LAVAL &"O. W.CHISHOLM.

WORK HOLDING CHUCK, APPLIUATION IILD MAY 2. 1901.

4 SHEETS-SHEET B.

F0 MODEL.

1' cams mins co., Puoau'mo.. wAsHmaron. uA c.

No. 718,573. PATENTED JAN. 13, 1903.

G. DE LAVAL 6v C. W. GHISHOLM. I

WORK HOLDING CHUCK.

y APPLICATION FILED MAY 2, 1901. l0 MODEL'. l 4 SHEETS-SHEET 4. i

ma owms PrcRS cp.. Pnvmumo.. wAsHmsmu. n. c.

Unirse Srnfrns PATBNT OFFICE.

GEORGE DE LAVAL, OF CAMBRIDGE, AND CHARLES W. CHISHOLM, OF SOMERVILLE,MASSACHUSETTS, ASSIGNORS TO THE GEORGE F. BLAKE MANUFACTURING COMPANY,OF NEW YORK, N. Y., A CORPORATION or New YORK.

WORK-HOLDING CHUCK.

SPECIFICATION forming part of Letters Patent No. 718,57 3, .datedJanuary 13, 1903. Application tiled May 2, 1901. Serial No. 58,452. (N0model.

To aZZ whom, it may concern:

Be it known that we, GEORGE DE LAVAL, of Cambridge, and CHARLES W.CHIsHoLM, of Somerville, inthe county of Middlesex and State ofMassachusetts, have invented certain new and useful Improvements inWork-Holding Chucks, of which the following is a speciication.

The invention relates to a work-holding device or chuck for securingcastings or other work in position upon the work table, platen, orcarriage of boring ory other metal-working machines. Heretofore insecuring the work in position it has been customary to employ variousangle-irons and straps and bolts to rigidly secure the work to thework-table, the work being brought to the proper height by the use ofblocks and sheets of metal of varying thickness inserted between thework and the table or carriage.

The adjustment of the work with relation to the boring-head or otheroperating-tool must be accurately made andthe work must be rigidly andfirmly held in place, and setting up or making ready the work in theusual manner therefore involves considerable accuratemanipulation,consumingacomparatively large proportion of time, andthereby reducing the production of the machine and increasing the costof the work being done.

It is the object of the present invention to provide means for securingthe work in place whereby the adjustment of the work into properrelation to the operating-tools or outters may be quickly and accuratelymade and the work be firmly held in position, thereby reducing the timenecessary for setting up the work and increasing the production of themachine. This is accomplished by providing two uprights, between whichthe work is secured, and an adjustable support between said uprightsupon which the work is supported and by which it may be broughtto theproper distance from the work table or carriage. The adjustable su pportpreferably comprises two relatively 'movable wedgeshaped blocks, whichform a solid support vfor the work, the height or thickness of which`sides of the work and hold it in place between the uprights.

The clamping su rfaees or jaws may be brought into engagement with thework by moving the uprights or by moving the jaws with relation to theuprights.

The features of the invention may be better understood by referring tothe accompanying drawings, in which simple, efficient,

and preferred forms of the invention are shown embodied in devices orchucks for securing work to the work-tables of boring-machines.

In the drawings, Figure l is a front elevation showing a work-holdingchuck embodying the features of invention in their preferred forms. Fig.2 is a side elevation showing two of said devices employed in holding asingle casting. Fig. 8 is a view showing a section through the base ofthe chuck and showing the face of an upright. Fig; 4 is a frontelevation of a modified form of holding device or chuck. Fig. 5 is adetail of the top bar, and Fig. 6 isa side elevation of the chuck.

In the chuck or holding device shown in Figs. l, 2, and 3 the work,which is a cylinder W, (indicated in dotted lines,) is held betweenuprights A B and is supported upon au adjustable support comprising twowedgeshaped blocks C D. The work is held from lateral movement byengaging or clamping surfaces or jaws on the upright-s, whichengageopposite sides of the work. The inner faces of the uprights mayform these sur-v faces or jaws, or they may be formed by plates d b,secured to ribs a b upon the inner side of the uprights, the platesbeing shaped to enga-ge the curved surface of the work and beingVmounted to have a limited rocking movement on pivots a2 b2, so as toaccommodate themselves to the surface of the work. After the plates havebeen brought into position to properly engage and clamp the work theymay be rigidly secu red to the uprights by bolts, as a3 b3. The ribs a'blmay be provided with series of holes along their sides, so that theengaging plates may be changed or may be secured in propel` position forvarious kinds of work. In the chuck shown the clamping surfaces or jawsare adjustable to engage and clamp the work by moving the uprightslaterally upon the base E, upon which said uprights are secured, thebase being provided with ways e, by which the uprights areheld andguided. The means for moving and adjusting the uprights consists ofscrew-rods a4 b4, mounted in the base E and engaging nuts a5 b5 on theuprights, the rods being provided with squared outer ends for receivinga wrench or other operating means.

The base may be secured to the workcarriage or table of the machine bysuitable bolts or straps. (Not shown.)

The work is supported upon the verticallyadjustable support formed bythe wedgeblocks C and D either by resting directly u pon the `upperblock C or upon a block F, as shown, and the height of the support isadjustable by moving one or both of the blocks C and D laterally. Thelower block D is guided in achannel e', formed in the base E, and themeans for adj usting this block consists of a screw-threaded rod d,pivoted to the block and engaged by a screwthreaded sleeve d', mountedto turn in a bearing-block d2, pivoted to the upright A, the sleevebeing held from longitudinal movement by collars d3, which engageopposite sides of the bearing-block. The sleeve d" may be provided witha squared outer end to receive a wrench or other operating means. Theadjusting means for the block C maybe the same as that shown for adjlisting-block D, or it may consist of a bar c, pivoted to the block andprovided with a series of notches cl, as shown. Vith this constructionthe block C may be moved to bring it into proper relation to the uprightB or to effect the approximate or coarser vertical adjustment of thework by a lever c2, temporarily connected with the up right B by a linkc3 and having a pin c4 for engaging the notches c'. When the block hasbeen properly adjusted, it may be locked or held in position by a latchc5, pivoted to the upright B and passing through a notch c and through aslot in the boss c3, through which the bar c passes. After the coarseradjustment has been made by moving the block C the final verticaladjustment may be made by movement of the block D The work may berigidly held down upon the support. by means of braces G, the upper endsof which engage shoulders formed upon the uprights for this purpose. Thebraces shown comprise two telescoping parts g g', and the part g isprovided with a screw-thread which is engaged by a nut g3. The end ofthe part g engages one of a series of shoulders as or bs, formed on theuprights, and the part g2 engages the work, the parts being forced apartto rigidly hold the work by turning the nut g.

It is sometimes desirable in setting up the work to move the uprightssimultaneously to one sidevor the other, and means are thereforeprovided for effecting this result. This is accomplished in the chuckshown by providing a coupling for connecting or disconnecting the rodsa4 b4 at will. One member @fof the coupling is secured to the inner endof the rod d4, and the member bof the coupling is keyed to slide on theinner end of rod b4, so that the members may be engaged or disengaged bysliding said member h6 on said rod. A hole bis formed in the member blinposition to register with a larger hole c4 in the base E, through whicha rod may be inserted into hole b7 for engaging or disengaging thecoupling. When the coupling is engaged, the rods a4 and b4 will turntogether, and the uprights may be simultaneously moved or adjusted, andwhen the coupling is disengaged the rods 0,4194 may be movedindependently to effect the independent movement or adjustment of eitherupright.

If it is desired to adjust or. move the uprights Without moving the supporting-block C or D, the bar c may be disconnected from the upright Bby turning back the latch c5, or the rod d may be disconnected from theupright A by withdrawing the pivot-pins d", which are made removable.

In order to increase lthe rigidity of the uprights and to prevent anyspringing or vibraling thereof when the machine is taking a heavy cut,the upper ends of the uprights may be connected together by a tie-rod I,pivoted to the upright A and carrying an adjustable shoe t' for engaginglugs 7l on the upright B. The shoe may be forced against the lugs tobind the uprights firmly together by a screw-th readed sleeve ft2,carrying an operating-wheel t3 at its outer end. In some cases it may bedesirable to employ two or more chucks for holding the work, asindicated in Fig. 2, and in such case the rigidity of the holdingdevices may be increased by connecting the uprights on each side of thework together, as by tie-rods K, and the uprightsn are provided withlugs k for securing such rods thereto. As indicated in Fig. 2, one endof the tie-rod may be connected directly with an upright by a pivot-pin7c', and the other end may be connected with the other upright by ablock 7a2, threaded on the rod and held between the lugs 7o by apivot-pin 7c.

In Figs. 4, 5, and G a somewhat different construction of chuck isshown,which embodies the same general features of invention that areembodied in the chuck already described. In this construction theuprights A B are adjustably secured to the base E', which may be thework table or carriage of the machine oraseparate plate secured theretoby means of bolts of b, passing through slots in the feet @101110015 theuprights and hav- IOO IIO

ing their heads located in undercut grooves e6 in the base, the uprightsbeing clamped to the base by the action of said bolts and the nuts dubi1. The clamping surfaces or jaws for engaging the opposite sides ofthe work W are formed by the ends of screw-rods (i12 512, mounted in theuprights and provided with disks 0.13 bat their outer ends, by whichthey may be turned to force the clamping surfaces or jaws against thework. The work is supported on the vertically-'adjustable supportcomprising the two Wedge-shaped blocks C D. The means for moving theblock C laterally consists of a screw-rod c6, pivoted thereto andengaged by a screw-threaded sleeve c7, mounted in a bearing-block CS,which is pivoted in the upright A, the sleeve being held from movementlongitudinally by collars ci), engaging opposite sides of thebearing-block. The sleeve e7 is provided with a squared outer end toreceive a wrench or other operating means. The block D' is adjusted by asimilar screw-rod CZG and sleeve d?. The work is held rigidly upon thesupport C D by a clamping-bar L, with a pivoted shoe Z for engaging thework and having one end secured to a screw-threaded rod Z', pivoted tothe upper end of upright A, and having the other end provided with aslot Z2 foar embracing a screw-rod Z3, pivoted to theupper end ofupright B. The rod Z carries two nuts Z4, arranged to engage oppositesides of the bar L, and by turning these nuts the end ofsaid bar may beadjusted on said rod. The rod Z3 carries a screw-threaded sleeve Z5, theinner end of which is arranged to engage the slotted end of bar L andthe outer end of which is provided with a disk for turning said sleeve.

When the workis to be removed or to be placed in position, the bar L isswung back out of the way. When the work has been properly adjusted andclamped by the ad-v justable support and by the clamping-surfaces, thebar is swunginto the position shown and the rod Z3 is engaged with theslot Z2.'

Then the sleeve Z5 is screwed down against the bar L to force theclamping-shoe firmly against the work and hold said work rigidly againstthe support C D.

What we claim, and desire to secure by Letters Patent, is-

l. A workholder comprising bedplates, each provided with a longitudinalgroove, vertical columns slidably mounted upon the bedplates, and havinga portion depending within the groove, a screw-shaft seated within thegroove of the bed-plate and engaged bythe depending portions of thecolumns, means on the bed-plate to vertically adjust the work, meansconnected to the columns to operate the vertically-adjustingmeans, andmeans at the top of the columns for holding the same and means forclamping the work therebetween.

2. A work-holder comprising bed-plates, vertical columns slidablymounted on the bedplates, means within the bed-plates for moving thecolumns back and forth, a hollow shaft carriedl by the columns,vertically-adjustingV wedge-blocks, a screw-rod telescoping within thehollow shaft and connected with the wedge-blocks, and a swivelconnection for the shaft and the columns.

3. The combination of bed-plates and the vertical columns slidablymounted upon the bed-plates, of a vertically-adjusting mechanism for thework consisting of wedges connected to a hollow shaft which is swiveledwithin a block carried by the vertical colu mns, means for causing thevertical columns to slide'back and forth upon the bed-plate, means t0allow the vertical-adj usting mechanism to be unaffected by the movementof the vertical columns, and means to hold the upper ends of thevertical col'u mns,and means to clamp the work between the same.

4. In a work-holder, the combination with the bed-plates, of the slidingcolumns mounted upon the bed-plates, a screw carried bythe bed-plate foroperating the columns,'a rod fas` tened to the upper end of one of thecolumns and detachably connected to the upper end of the other column atits free end, keeper-rods connected near the upper end of one pair ofcolumns and connected at their other ends to the other pair of columnsand adapted to span the space across the bed-plates.

5. A chuck for securing work upon the work-table of a metal-workingmachine con sisting of uprights between which thework is rigidly held,and a support between said uprightsvertically adjustable independentlyof the uprights for supporting the work and determining the distance ofthe work from the work-table, and means whereby the work is rigidlyhelddown upon said support, substantially as described.

6. A chuck for securing work upon the work-table of a metal-workingmachine consisting of uprights provided with clampingsu'rfaces forengaging the work and rigidly holding it from lateral movement, and asupport between said uprights vertically adjustable independently ofsaid uprights for supporting the work and determining the distance -ofthe work from the work-table, and means whereby the work is rigidly helddown upon said support, substantially as described.

7. A chuck for securing work upon the work-table of a metal-workingmachine consisting of uprights provided with clampingsurfaces, means forengaging said surfaces IOO IIO

with the work to rigidly hold it from lateral movement, and a supportbetween said uprights adjustable independently thereof for supportingthe work and determining the distance of the work above the work-table,and means whereby the work is rigidly held down upon said support,substantially as described.

8. A chuck for securing Work upon the work-table of a metalworkingmachine consisting of a base, uprights mounted thereon means foradjusting said uprights, a worksupport between said uprights, and aseries of shoulders on said uprights, substantially as described.

9. A chuck for securing work upon the work-table ot' a metal-Workingmachine consisting of uprights between which the work is rigidly held,wedge-blocks between said uprights for supporting the work, meanswhereby the work is rigidly held down upon said wedge-blocks, and meansfor adjusting one or more ofsaid blocks to determine the distance of thework above the work-table, substantially as described.

l0. A chuck for securing work upon the work-table of a metal-workingmachine consisting of laterally-adjustable uprights between which thework is held, wedge-blocks between said uprights for supporting thevwork, means whereby the work is rigidly held down upon saidwedge-blocks, and means for adjusting one or more of said blocks,substantially as described.

11. A chuck for securing wo'rk upon the work-table of a metal-workingmachine consisting of uprights between which the work is rigidly held,means for adjusting said uprights laterally, and a support between saiduprights vertically adjustable independently of said uprights forsupporting the work and determining the distance of the Work above theWork-table and means whereby the work is rigidly held down upon saidsupport, substantially as described.

12. A chuck for securing Work upon the work-table of a metal-workingmachine consisting of uprights between which the work is rigidly heldmeans for independently adjusting the uprights laterally, means forsimultaneously adjusting said uprights in the same direction and avertically-adjustable support between said uprights, substantially asdescribed.

18. A chuck for securing work upon the work-table of a metal-Workingmachine consisting of uprights A B, rods a4 b4 for adjusting the same,wedge-blocks C D between said uprights, and adjusting devices for movingone or both of said blocks laterally su bstantially as described.

In testimony whereof we have aixed our signatures in presence of twowitnesses.-

GEORGE DE LAVAL. CHARLES XV. CHISHOLM.

Witnesses: JOHN J. FINLEY, E. R. STICKNEY.

